Take into account that concrete removal can be a lot of work that can cause burn out well before the project is finished. First, determine what lies beneath the surface. It is usually assumed that if there appears to be an overflow of concrete around the bottom edge of the pad, that there was a minimal amount of concrete used, and the pad may in fact be hollow. What seems like a huge demolition job becomes much easier when you do this. Don’t be discouraged if you find wire instead of rebar reinforcement in the concrete. As demolition proceeds, a reciprocating saw can be used to cut up the wire so that the jackhammer-destroyed pieces can be removed.
In addition to giving more room for efficiency, it will be much easier to remove the wire from the concrete than to try to rip it apart by hand or to pick it up all afterward. Even if there is no rebar running through the concrete, there is a good chance that there will be a rebar anchor attached up against the foundation. In this case, you will have to use a reciprocating saw with a metal blade to cut the anchor. Make sure to cut the offending piece as close as possible to the wall but you can also use a 5-pound hammer.
Finally, epoxy the hole to make it smooth, clean, and keep water from leaking into the house.
Utilize a “spud bar” along with the jackhammer to break up the concrete. Grab the spud bar with both hands and jam the flat end into cracks left by the jackhammer, then leverage to pry concrete chunks off the pad. Remember to use the correct form when lifting concrete pieces, doing so can lead to injury very easily. Let your concrete wheelbarrow tip over if it starts to tip. Do not attempt to save it, as falling concrete may cause serious injury.